[llvm] [VPlan] Don't collect live-ins in collectUsersInExitBlocks. (NFC) (PR #123819)

[Florian Hahn via llvm-commits]

================
@@ -9077,11 +9081,6 @@ addUsersInExitBlocks(VPlan &Plan,
   // modeling the corresponding LCSSA phis.
   for (VPIRInstruction *ExitIRI : ExitUsersToFix) {
     for (const auto &[Idx, Op] : enumerate(ExitIRI->operands())) {
-      // Pass live-in values used by exit phis directly through to their users
-      // in the exit block.
----------------
fhahn wrote:

Yes definitely the patch tries to help simplify https://github.com/llvm/llvm-project/pull/120567, so we should only land this if it helps.

https://github.com/llvm/llvm-project/pull/123819